Engineering machinery floating oil seal double-end centrifugal test equipment

Abstract

The invention discloses engineering machinery floating oil seal double-end centrifugal test equipment, and relates to the technical field of mechanical part testing, the engineering machinery floating oil seal double-end centrifugal test equipment comprises a test assembly and a limiting assembly, and the top of the test assembly is provided with an opening and closing assembly, a moving assembly and a rotating assembly. When the displacement sensor is used, a first hydraulic rod in the moving assembly drives a mounting ring to move back and forth, four opening and closing racks can be driven to move back and forth, four opening and closing gears are driven to rotate back and forth, an opening and closing frame is driven to rotate back and forth through an opening and closing rod, and a plurality of displacement sensor bodies can be folded to a to-be-detected position at the same time. The displacement sensors do not need to be installed and adjusted one by one, a large amount of time and labor cost are saved, through overall overturning, multiple sensors can be in place at the same time, multiple displacement sensor bodies can be rapidly rotated and moved away at the same time, multiple sensors do not need to be installed one by one and then disassembled one by one, the operation process is greatly simplified, time waste is reduced, and the working efficiency is improved. The working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical component testing, and particularly to a double-head centrifugal testing device for floating oil seals of construction machinery. Background Technique

[0002] The floating oil seal of construction machinery is a common name for floating seals and belongs to a type of mechanical seal in dynamic seals. It generally consists of a pair of wear-resistant metal rings and a pair of rubber rings, and is mainly used to seal related components of construction machinery in harsh working environments such as multi-coal powder, sediment, water vapor, etc. The double-head centrifugal test of mechanical floating oil seals is a performance test method for floating oil seals. By simulating the high-speed rotation working condition of the floating oil seal in actual work, it is tested on a double-head centrifugal test device to evaluate the sealing performance, wear resistance, structural stability and other indicators of the floating oil seal under the action of centrifugal force.

[0003] In the prior art, when using a double-head centrifugal test device for floating oil seals of construction machinery, first, the floating oil seal needs to be installed in the sealing cavity, then the sealing cavity is installed on the test device, and multiple displacement sensors also need to be installed around the sealing cavity to monitor the displacement changes of the floating oil seal during operation from different angles. When the test is completed, the multiple displacement sensors need to be disassembled one by one before the sealing cavity and the floating oil seal can be removed.

[0004] During the centrifugal test of the floating oil seal, multiple displacement sensors need to be installed and disassembled one by one. The process is cumbersome, increasing the overall operation time and affecting the overall test efficiency. If the disassembly process is not properly operated, it will accidentally collide with the sealing cavity, causing damage to the sensors and affecting the test accuracy.

[0005] Therefore, we propose a double-head centrifugal test device for floating oil seals of construction machinery to solve the problems raised in the above background technique. Summary of the Invention

[0006] The purpose of the present invention is to provide a double-head centrifugal test device for floating oil seals of construction machinery to solve the problems that during the centrifugal test of the floating oil seal proposed in the above background technique, the installation and disassembly process of multiple displacement sensors is cumbersome, increasing the overall operation time and affecting the overall test efficiency. If the operation is improper, it will also cause damage to the sensors and affect the test accuracy.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A double-head centrifugal test device for floating oil seals of construction machinery, including a test component and a limiting component, and an opening and closing component, a moving component and a rotating component are arranged at the top of the test component; The opening and closing assembly includes four opening and closing racks, and opening and closing gears are meshed with the outer surfaces of the four opening and closing racks. Opening and closing rods are fixedly installed inside the four opening and closing gears, opening and closing frames are fixedly installed on the outer surfaces of the four opening and closing rods, displacement sensor bodies are arranged inside the four opening and closing frames, and the opening and closing frames are used to drive the displacement sensor bodies to unfold and close; The testing assembly includes a main shaft and a sub-shaft, and sealing specimens are connected to one ends of the main shaft and the sub-shaft through bolts.

[0008] Preferably, the opening and closing assembly further includes four movable frames. The outer surfaces of the four opening and closing racks are respectively movably embedded inside the four movable frames. Sliding grooves are formed on the outer surfaces of both sides of the four opening and closing racks. Slide rods are fixedly installed on both sides inside the four movable frames. One ends of the multiple slide rods are respectively movably embedded inside the multiple sliding grooves. Both ends of the four opening and closing rods are respectively movably embedded on both sides inside the four movable frames.

[0009] Preferably, the testing assembly further includes a testing table and a control system. A driving system is arranged on one side of the top of the testing table. The other end of the main shaft is fixedly connected to the output end of the driving system. A feeding system is arranged inside the testing table. A measuring system is arranged on the top of the feeding system. The other end of the sub-shaft is fixedly installed on the outer surface of one side of the measuring system. An oil injection hole is formed on the outer surface of one of the sealing specimens, and a sealing plug is movably embedded inside the oil injection hole.

[0010] Preferably, the testing assembly further includes a second hydraulic rod. A moving plate is fixedly installed at the top end of the second hydraulic rod. An oil collecting box is movably embedded inside the moving plate. An inner embedding groove is formed on the top of the testing table. The outer surfaces of the moving plate and the oil collecting box are both movably embedded inside the inner embedding groove. The bottom end of the second hydraulic rod is fixedly installed on the bottom surface inside the testing table. A protective sliding cover is slidably connected to the outer surface of the measuring system.

[0011] Preferably, the moving assembly includes an annular frame, a mounting ring and two first hydraulic rods. Moving frames are fixedly installed on the top and bottom of the annular frame. Four support rods are fixedly installed on the outer surface of one side of the measuring system. One ends of the four support rods respectively pass through the outer surfaces of one sides of the two moving frames movably. The four opening and closing racks are all installed on the outer surface of one side of the mounting ring through bolts. One ends of the two first hydraulic rods are respectively fixedly installed on the outer surfaces of one sides of the two moving frames. The other ends of the two first hydraulic rods are both fixedly installed on the outer surface of one side of the measuring system.

[0012] Preferably, the rotating assembly includes an annular gear, an annular groove is formed on the outer surface of the annular gear, the outer surface of the annular frame is movably embedded in the annular groove, and the outer surface of the mounting ring is fixedly mounted on the inner wall of the annular gear.

[0013] Preferably, the rotating assembly further includes a reversible motor, a driving gear is fixedly mounted on the output end of the reversible motor, the outer surface of the driving gear meshes with the outer surface of the annular gear, the bottom of the reversible motor is fixedly mounted on the top of the mounting plate, the moving assembly further includes a mounting plate, and the outer surface of one side of the mounting plate is fixedly mounted on the outer surface of the other side of one of the moving frames.

[0014] Preferably, the limiting assembly includes a fixed ring, an annular rotating groove is formed on the outer surface of the fixed ring, a connecting plate is movably embedded in the annular rotating groove, an annular electromagnet is fixedly mounted on the outer surface of one side of the connecting plate, and the inner wall of the fixed ring is fixedly mounted on the outer surface of one end of the secondary shaft.

[0015] Preferably, the limiting assembly further includes two electric push rods, an annular plate is fixedly mounted on one end of the two electric push rods, a plurality of moving rods are fixedly mounted on the outer surface of one side of the annular plate, one ends of the plurality of moving rods all movably penetrate through the fixed ring to the inside of the annular rotating groove, one ends of the plurality of moving rods are all fixedly mounted on the outer surface of the other side of the connecting plate, a mounting opening is formed on the outer surface of one side of the fixed ring, a compensation block is arranged inside the mounting opening, the compensation block is connected to the fixed ring through a bolt, and the other ends of the two electric push rods are all fixedly mounted on the outer surface of one side of the measuring system near the secondary shaft.

[0016] Preferably, the outer surfaces of the four movable frames are all movably embedded in the annular rotating groove, magnetic absorption grooves are formed on the outer surfaces of one sides of the four movable frames, arc-shaped magnets are arranged inside the four magnetic absorption grooves, and the outer surfaces of one sides of the four arc-shaped magnets are all magnetically connected to the outer surface of one side of the annular electromagnet.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. When the present invention is in use, the first hydraulic rod in the moving component drives the mounting ring to move back and forth, which can drive the four opening and closing racks back and forth and drive the four opening and closing gears to rotate back and forth. By driving the opening and closing rod, the opening and closing frame can be driven to rotate back and forth, so that multiple displacement sensor bodies can be closed to the detection position at the same time. There is no need to install and adjust the displacement sensors one by one, saving a large amount of time and labor costs. Through overall flipping, multiple sensors can be in place at the same time, reducing the position deviation that may occur when installing sensors one by one. After the detection is completed, multiple displacement sensor bodies can be quickly rotated and moved away at the same time, creating space for subsequent disassembly of the floating oil seal and other operations. During the whole testing process, there is no need to install and then disassemble multiple sensors one by one, greatly simplifying the operation process, reducing time waste, improving the reliability and stability of the equipment, making the whole testing process smoother, and improving work efficiency.

[0018] 2. When the present invention is in use, start the feed system to drive the measurement system and the auxiliary shaft to move so that the two floating oil seals come into contact. Inject lubricating oil into the sealing specimen through the oil injection hole. Start the drive system to drive the main shaft to rotate, driving the sealing specimen and the floating oil seal to rotate. At the same time, multiple displacement sensor bodies monitor the gap change, relative movement, etc. of the contact surface and transmit the detected conditions to the control system. After the test is completed, start the second hydraulic rod to push the moving plate and the oil collecting box upward. The movement of the feed system separates the two floating oil seals, and the lubricating oil in the sealing specimen drips downward into the oil collecting box to collect the lubricating oil and prevent the lubricating oil from dripping onto the equipment, causing the equipment to be dirty.

[0019] 3. When the present invention is in use, turn off the annular electromagnet and start the two electric push rods to pull the annular plate, the moving rod and the connecting plate to move, so that the annular electromagnet is separated from the arc magnet, reducing the wear between the arc magnet and the annular electromagnet during the subsequent rotation of the arc magnet, which affects the subsequent magnetic adsorption effect. Start the forward and reverse motor to drive the driving gear, the annular gear, the mounting ring and the opening and closing rack to rotate, and drive the movable frame to rotate, adjusting the position of the displacement sensor body, so that the floating oil seal can be detected from different angles, obtaining more comprehensive displacement data, and thus more accurately evaluating the dynamic performance of the floating oil seal.

[0020] 4. When the present invention is in use, remove the bolts between the opening and closing rack and the mounting ring, and remove the bolts between the compensation block and the fixed ring. Take out the compensation block, then rotate the movable frame to the mounting opening and slide it outwards. Through the mounting opening, the opening and closing components of a single small unit can be removed separately for replacement or maintenance, which is more convenient and does not affect the normal operation of the whole. New opening and closing components of a small unit can also be installed, which is convenient for installing other sensors on the new opening and closing frame. Under the action of the moving component, the opening and closing of multiple displacement sensor bodies and other sensors can be realized, which is more flexible and diverse and has better applicability. Start the ring-shaped electromagnet to generate magnetic attraction, tightly adsorb the arc-shaped magnet, thereby fixing the movable frame and improving the stability of the opening and closing component, which is beneficial for the sensor to perform detection better. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the front perspective view of a double-headed centrifugal test device for floating oil seals of construction machinery according to the present invention; Figure 2 is the unfolded perspective view of the structure of the moving plate in a double-headed centrifugal test device for floating oil seals of construction machinery according to the present invention; Figure 3 is the unfolded perspective view of the structure of the opening and closing component in a double-headed centrifugal test device for floating oil seals of construction machinery according to the present invention; Figure 4 is the sectional view of the structure of the moving component in a double-headed centrifugal test device for floating oil seals of construction machinery according to the present invention; Figure 5 is the sectional view of the structure of the rotating component in a double-headed centrifugal test device for floating oil seals of construction machinery according to the present invention; Figure 6 is the sectional view of the structure of the fixed ring in a double-headed centrifugal test device for floating oil seals of construction machinery according to the present invention; Figure 7 is the sectional view of the structure of the ring gear in a double-headed centrifugal test device for floating oil seals of construction machinery according to the present invention; Figure 8 is the sectional view of the structure of the compensation block in a double-headed centrifugal test device for floating oil seals of construction machinery according to the present invention; Figure 9 is the sectional view of the structure of the limiting component in a double-headed centrifugal test device for floating oil seals of construction machinery according to the present invention; Figure 10 is another perspective view of the opening and closing component in a double-headed centrifugal test device for floating oil seals of construction machinery according to the present invention.

[0022] In the figure: 1. Test component; 101. Test bench; 102. Control system; 103. Drive system; 104. Feed system; 105. Measurement system; 106. Protective sliding cover; 107. Spindle; 108. Sub-spindle; 109. Sealed specimen; 110. Oil injection hole; 111. Sealing plug; 112. Embedded groove; 113. Second hydraulic rod; 114. Moving plate; 115. Oil collecting box; 2. Opening and closing component; 201. Opening and closing rack; 202. Movable frame; 203. Opening and closing rod; 204. Opening and closing gear; 205. Opening and closing frame; 206. Displacement sensor body; 207. Chute; 208. Slide bar; 209. Magnetic attraction groove; 210. Arc magnet; 3. Moving component; 301. Ring-shaped frame; 302. Moving frame; 303. First hydraulic rod; 304. Support rod; 305. Mounting plate; 306. Mounting ring; 4. Rotating component; 401. Reversible motor; 402. Driving gear; 403. Ring gear; 404. Ring groove; 5. Limiting component; 501. Fixed ring; 502. Ring-shaped rotating groove; 503. Connecting plate; 504. Ring-shaped electromagnet; 505. Electric push rod; 506. Ring-shaped plate; 507. Moving rod; 508. Mounting port; 509. Compensation block. Specific implementation manner

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Embodiment 1: Please refer to Figures 1 - 10As shown in the figure, the present invention provides a technical solution: a double-headed centrifugal test device for floating oil seals of construction machinery, including a test component 1 and a limit component 5. An opening and closing component 2, a moving component 3, and a rotating component 4 are arranged on the top of the test component 1; the opening and closing component 2 includes four opening and closing racks 201. The outer surfaces of the four opening and closing racks 201 are all meshed with opening and closing gears 204. Opening and closing rods 203 are fixedly installed inside the four opening and closing gears 204. Opening and closing frames 205 are fixedly installed on the outer surfaces of the four opening and closing rods 203. Displacement sensor bodies 206 are arranged inside the four opening and closing frames 205. The opening and closing frames 205 are used to drive the displacement sensor bodies 206 to expand and close; the test component 1 includes a main shaft 107 and a sub-shaft 108. One end of each of the main shaft 107 and the sub-shaft 108 is bolted with a sealing specimen 109. The opening and closing component 2 further includes four movable frames 202. The outer surfaces of the four opening and closing racks 201 are respectively movably embedded inside the four movable frames 202. Sliding grooves 207 are opened on both outer surfaces of the four opening and closing racks 201. Slide rods 208 are fixedly installed on both sides inside the four movable frames 202. One ends of the multiple slide rods 208 are respectively movably embedded inside the multiple sliding grooves 207. Both ends of the four opening and closing rods 203 are respectively movably embedded on both sides inside the four movable frames 202. The test component 1 further includes a test bench 101 and a control system 102. A driving system 103 is arranged on one side of the top of the test bench 101. The other end of the main shaft 107 is fixedly connected to the output end of the driving system 103. A feeding system 104 is arranged inside the test bench 101. A measuring system 105 is arranged on the top of the feeding system 104. The other end of the sub-shaft 108 is fixedly installed on the outer surface of one side of the measuring system 105. An oil injection hole 110 is opened on the outer surface of one of the sealing specimens 109. A sealing plug 111 is movably embedded inside the oil injection hole 110. The test component 1 further includes a second hydraulic rod 113. The top end of the second hydraulic rod 113 is fixedly installed with a moving plate 114. An oil collecting box 115 is movably embedded inside the moving plate 114. An embedded groove 112 is opened on the top of the test bench 101. The outer surfaces of the moving plate 114 and the oil collecting box 115 are both movably embedded inside the embedded groove 112. The bottom end of the second hydraulic rod 113 is fixedly installed on the bottom surface inside the test bench 101. A protective sliding cover 106 is slidably connected to the outer surface of the measuring system 105. The moving component 3 includes an annular frame 301, an installation ring 306, and two first hydraulic rods 303. Moving frames 302 are fixedly installed on both the top and the bottom of the annular frame 301. Four support rods 304 are fixedly installed on the outer surface of one side of the measuring system 105. One ends of the four support rods 304 respectively pass through the outer surface of one side of the two moving frames 302 movably. The four opening and closing racks 201 are all bolted to the outer surface of one side of the installation ring 306. One ends of the two first hydraulic rods 303 are respectively fixedly installed on the outer surface of one side of the two moving frames 302. The other ends of the two first hydraulic rods 303 are both fixedly installed on the outer surface of one side of the measuring system 105.

[0025] In this embodiment, during use, the outer surface of the secondary shaft 108 is movably embedded inside the mounting ring 306 and the annular plate 506, and the outer surface at one end of the secondary shaft 108 is fixedly installed inside the fixed ring 501. The drive system 103, the feed system 104, the measurement system 105, the second hydraulic rod 113, the displacement sensor body 206, the first hydraulic rod 303, the forward and reverse motor 401, the annular electromagnet 504, the electric push rod 505 and the control system 102 are electrically connected. The initial state of the opening and closing assembly 2 is as Figure 3 shown, and the four opening and closing frames 205 are in the open state. Two floating oil seals are respectively installed into the two sealed specimens 109, and then the sealed specimen 109 with the sealing plug 111 is first installed at one end of the secondary shaft 108, and then the other sealed specimen 109 is installed at one end of the main shaft 107. The feed system 104 is started to drive the measurement system 105, the protective sliding cover 106, the opening and closing assembly 2, the moving assembly 3, the rotating assembly 4 and the secondary shaft 108 to move together, pushing the left sealed specimen 109 towards the right sealed specimen 109, so that the two floating oil seals are in close contact. Then the sealing plug 111 is opened, and lubricating oil is injected into the sealed specimen 109 through the oil injection hole 110. Then the two first hydraulic rods 303 are started to pull the two moving frames 302 and the annular frame 301 to move to the left, driving the annular gear 403 and the mounting ring 306 to move to the left on the outer surface of the secondary shaft 108, and driving the four opening and closing racks 201 to move to the left inside the corresponding movable frames 202 respectively. At the same time, the corresponding opening and closing gears 204 are driven to rotate. The opening and closing gears 204 are fixedly installed on the outer surface of the opening and closing rod 203, which will drive the opening and closing rod 203 to rotate inside the movable frame 202, further driving the opening and closing frame 205 to rotate towards the sealed specimen 109 with the opening and closing rod 203 as the axis. At this time, the four opening and closing frames 205 drive the four displacement sensor bodies 206 to close towards the sealed specimen 109. When the two first hydraulic rods 303 are automatically closed, the four displacement sensor bodies 206 just close to the contact surface of the two floating oil seals, as Figure 10As shown, it is not necessary to install multiple displacement sensor bodies 206 one by one. After the preparation work is completed, start the drive system 103 to drive the main shaft 107 to rotate, driving the corresponding sealing specimen 109 and floating oil seal to rotate. At the same time, start multiple displacement sensor bodies 206 to monitor the gap change and relative movement of the contact surface, etc., and convey the detected situation to the control system 102. The staff can view the relevant test data monitored and recorded through the control system 102 to complete the test of the floating oil seal. After the centrifugal test is over, start the two first hydraulic rods 303 again. At this time, the two first hydraulic rods 303 push the moving frame 302, the annular frame 301, the annular gear 403, the mounting ring 306 and the four opening and closing racks 201 to move to the right, thereby driving the four opening and closing gears 204 to rotate in the reverse direction, causing the opening and closing frame 205 to rotate in the reverse direction. At this time, the four opening and closing frames 205 drive the four displacement sensor bodies 206 to rotate in the reverse direction and open, leaving the sealing specimen 109 and returning to the initial state. Start the second hydraulic rod 113 to push the moving plate 114 and the oil collecting box 115 upward to the lower part of the two sealing specimens 109. Start the feeding system 104 again to drive the measuring system 105 and the auxiliary shaft 108 to move to the left and reset, separating the two floating oil seals. At this time, the lubricating oil in the two sealing specimens 109 drips downward into the oil collecting box 115 to collect the lubricating oil, preventing the lubricating oil from dripping onto the equipment and making the equipment dirty. The staff can take out the oil collecting box 115 from the moving plate 114 to clean the lubricating oil in the oil collecting box 115. Finally, remove the sealing specimen 109 on the main shaft 107, and then remove the sealing specimen 109 on the auxiliary shaft 108. Under the action of the opening and closing assembly 2, multiple displacement sensor bodies 206 can be closed to the detection position at the same time, without installing and adjusting the displacement sensors one by one, saving a lot of time and labor costs. Through the overall flipping, multiple sensors can be in place at the same time, reducing the position deviation that may occur due to installing the sensors one by one; after the detection, multiple displacement sensor bodies 206 can be quickly rotated and moved away from the detection position at the same time, making room for subsequent disassembly of the floating oil seal and other operations. During the whole test process, it is not necessary to install and disassemble multiple sensors one by one, greatly simplifying the operation process, reducing time waste, reducing the risk of sensor damage or equipment failure caused by improper operation, improving the reliability and stability of the equipment, making the whole test process smoother, improving work efficiency, and solving the problem that the installation and disassembly process of multiple displacement sensors is cumbersome during the centrifugal test of the floating oil seal, increasing the overall operation time and affecting the overall test efficiency. If the operation is improper, it will also cause sensor damage and affect the test accuracy.

[0026] Embodiment 2: As Figures 3 - 9As shown, the limit component 5 includes a fixed ring 501. An annular rotating groove 502 is formed on the outer surface of the fixed ring 501. A connecting plate 503 is movably embedded in the annular rotating groove 502. An annular electromagnet 504 is fixedly installed on the outer surface of one side of the connecting plate 503. The inner wall of the fixed ring 501 is fixedly installed on the outer surface of one end of the secondary shaft 108. The limit component 5 further includes two electric push rods 505. An annular plate 506 is fixedly installed at one end of the two electric push rods 505. A plurality of moving rods 507 are fixedly installed on the outer surface of one side of the annular plate 506. The rotating component 4 includes an annular gear 403. An annular groove 404 is formed on the outer surface of the annular gear 403. The outer surface of the annular frame 301 is movably embedded in the annular groove 404. The outer surface of the mounting ring 306 is fixedly installed on the inner wall of the annular gear 403. The rotating component 4 further includes a forward and reverse motor 401. The output end of the forward and reverse motor 401 is fixedly installed with a driving gear 402. The outer surface of the driving gear 402 meshes with the outer surface of the annular gear 403. The bottom of the forward and reverse motor 401 is fixedly installed on the top of the mounting plate 305. The moving component 3 further includes a mounting plate 305. The outer surface of one side of the mounting plate 305 is fixedly installed on the outer surface of the other side of one of the moving frames 302.

[0027] In this embodiment, during use, the annular electromagnet 504 is turned off, so that the magnetism between the annular electromagnet 504 and the four arc magnets 210 disappears. The two electric push rods 505 are started to pull the annular plate 506 and the plurality of moving rods 507 to move, driving the connecting plate 503 to move in the annular rotating groove 502, so that the annular electromagnet 504 is separated from the four arc magnets 210, reducing the wear between the annular electromagnet 504 and the four arc magnets 210 when the arc magnets 210 rotate subsequently and affecting the subsequent magnetic adsorption effect. The forward and reverse motor 401 is started. The driving gear 402 is driven to rotate through the output end of the forward and reverse motor 401, further driving the annular gear 403 to rotate inside the annular frame 301, and driving the mounting ring 306 and the four opening and closing racks 201 to rotate. The opening and closing racks 201 are embedded in the movable frame 202. As the four opening and closing racks 201 rotate, the four movable frames 202 will be driven to rotate inside the annular rotating groove 502, further driving the four opening and closing frames 205 and the displacement sensor body 206 to rotate, thereby adjusting the position of the displacement sensor body 206, enabling the floating oil seal to be detected from different angles, obtaining more comprehensive displacement data, and thus more accurately evaluating the dynamic performance of the floating oil seal.

[0028] Embodiment Three: As Figure 4 and Figures 6 - 9As shown in the figure, an opening and closing component 2, a moving component 3, and a rotating component 4 are arranged on the top of the test component 1. The limiting component 5 includes a fixed ring 501. An annular rotating groove 502 is formed on the outer surface of the fixed ring 501. A connecting plate 503 is movably embedded in the annular rotating groove 502. An annular electromagnet 504 is fixedly installed on the outer surface of one side of the connecting plate 503. The inner wall of the fixed ring 501 is fixedly installed on the outer surface of one end of the auxiliary shaft 108. The limiting component 5 further includes two electric push rods 505. An annular plate 506 is fixedly installed at one end of the two electric push rods 505. A plurality of moving rods 507 are fixedly installed on the outer surface of one side of the annular plate 506. One end of each of the plurality of moving rods 507 movably penetrates through the fixed ring 501 to the inside of the annular rotating groove 502. One end of each of the plurality of moving rods 507 is fixedly installed on the outer surface of the other side of the connecting plate 503. An installation port 508 is formed on the outer surface of one side of the fixed ring 501. A compensation block 509 is arranged inside the installation port 508. The compensation block 509 is connected to the fixed ring 501 by bolts. The other end of each of the two electric push rods 505 is fixedly installed on the outer surface of one side of the measuring system 105 near the auxiliary shaft 108. The outer surfaces of the four movable frames 202 are all movably embedded in the annular rotating groove 502. A magnetic attraction groove 209 is formed on the outer surface of one side of each of the four movable frames 202. An arc-shaped magnet 210 is arranged inside each of the four magnetic attraction grooves 209. The outer surface of one side of each of the four arc-shaped magnets 210 is magnetically connected to the outer surface of one side of the annular electromagnet 504.

[0029] In this embodiment, during use, the annular electromagnet 504 is turned off, and the electric push rod 505 is started to pull the connecting plate 503 to move, so that the annular electromagnet 504 is separated from the four arc-shaped magnets 210. Remove the bolts connecting the opening and closing rack 201 and the mounting ring 306, and then remove the bolts between the compensation block 509 and the fixed ring 501, then the compensation block 509 can be removed from the inside of the mounting port 508. Then rotate the movable frame 202 to the mounting port 508 and slide it outwards, and the movable frame 202 and the opening and closing rack 201 can be removed from the outer surface of the secondary shaft 108 together. The opening and closing assembly 2 can be divided into four small units, each small unit is composed of an opening and closing rack 201, a movable frame 202 and an opening and closing frame 205. Through the mounting port 508, a single small unit of the opening and closing assembly 2 can be removed or a new small unit of the opening and closing assembly 2 can be installed. By removing a single small unit of the opening and closing assembly 2, it can be replaced or maintained separately, which is more convenient and does not affect the normal operation of the whole. A lot of mounting holes are provided on the outer surface of the mounting ring 306. By additionally installing a single small unit of the opening and closing assembly 2 and fixing the opening and closing rack 201 therein to the mounting ring 306 with bolts, it is convenient for the staff to install other sensors on the new opening and closing frame 205. Under the action of the moving assembly 3, the opening and closing of multiple displacement sensor bodies 206 and other sensors can be realized, which is more flexible and diverse and has better applicability. Start the electric push rod 505 again to push the annular plate 506, the moving rod 507 and the connecting plate 503 to move, so that the annular electromagnet 504 contacts the arc-shaped magnet 210 again, and then start the annular electromagnet 504 to generate magnetic attraction to tightly adsorb the arc-shaped magnet 210, thereby fixing the movable frame 202 and improving the stability of the opening and closing assembly 2, which is beneficial for the sensor to perform detection better.

[0030] The effects achieved by the entire mechanism and its working principle are as follows: Two floating oil seals are respectively installed in two sealing specimens 109. Then, the sealing specimen 109 with the sealing plug 111 is first installed at one end of the auxiliary shaft 108, and then another sealing specimen 109 is installed at one end of the main shaft 107. The feeding system 104 is started to drive the measuring system 105 and the auxiliary shaft 108 to move together, pushing the left sealing specimen 109 towards the right sealing specimen 109 so that the two floating oil seals are in close contact. Then, the sealing plug 111 is opened, and lubricating oil is injected into the sealing specimen 109 through the oil injection hole 110. Next, two first hydraulic rods 303 are started to pull the two moving frames 302, the annular frame 301, the annular gear 403, and the mounting ring 306 to move to the left, and drive the four opening and closing racks 201 to move to the left. The rotation of the opening and closing gear 204 drives the rotation of the opening and closing rod 203, causing the opening and closing frame 205 to rotate towards the sealing specimen 109 with the opening and closing rod 203 as the axis. At this time, the four displacement sensor bodies 206 move towards the sealing specimen 109. When the two first hydraulic rods 303 are automatically closed, the four displacement sensor bodies 206 just close to the contact surface of the two floating oil seals. After the preparatory work is completed, the driving system 103 is started to drive the main shaft 107 to rotate, driving the corresponding sealing specimen 109 and the floating oil seal to rotate. At the same time, multiple displacement sensor bodies 206 are started to monitor the gap change and relative movement of the contact surface, etc., and the detected conditions are transmitted to the control system 102. The staff can view the relevant test data monitored and recorded through the control system 102. After the test is completed, the two first hydraulic rods 303 are started again. At this time, the two first hydraulic rods 303 push the opening and closing racks 201 to move to the right, driving the four opening and closing gears 204 to rotate in the reverse direction. At this time, the four opening and closing frames 205 drive the four displacement sensor bodies 206 to rotate in the reverse direction and open, leaving the sealing specimen 109 and returning to the initial state. The second hydraulic rod 113 is started to push the moving plate 114 and the oil collecting box 115 to move upward to the lower part of the two sealing specimens 109. The feeding system 104 is started again to drive the measuring system 105 and the auxiliary shaft 108 to move to the left and reset, separating the two floating oil seals. At this time, the lubricating oil in the two sealing specimens 109 drips downward into the oil collecting box 115. Finally, the sealing specimens 109 on the main shaft 107 and the auxiliary shaft 108 are removed in sequence. The annular electromagnet 504 is turned off, and the magnetism disappears. Two electric push rods 505 are started to pull the annular plate 506, the moving rod 507, and the connecting plate 503 to move, separating the annular electromagnet 504 from the four arc-shaped magnets 210. The forward and reverse motor 401 is started to drive the driving gear 402 and the annular gear 403 to rotate, and drive the mounting ring 306 and the four opening and closing racks 201 to rotate, further driving the four movable frames 202 to rotate inside the annular rotating groove 502 to adjust the position of the displacement sensor body 206.Restart the electric push rod 505 again to push the annular plate 506, the moving rod 507 and the connecting plate 503 to move, so that the annular electromagnet 504 contacts the arc magnet 210 again. Then start the annular electromagnet 504 to generate magnetic attraction force to firmly adsorb the arc magnet 210, thereby fixing the movable frame 202.

[0031] Among them, the control system 102, the drive system 103, the feeding system 104, the measuring system 105, the second hydraulic rod 113, the displacement sensor body 206, the first hydraulic rod 303, the positive and negative motor 401, the annular electromagnet 504 and the electric push rod 505 are all prior arts. Their components and working principles are all publicly known technologies and will not be explained in detail here.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A double-head centrifugal testing device for floating oil seals of engineering machinery, comprising a testing component (1) and a limit component (5), characterized in that: An opening and closing component (2), a moving component (3) and a rotating component (4) are arranged on the top of the test component (1); The opening and closing assembly (2) comprises four opening and closing racks (201), the outer surfaces of the four opening and closing racks (201) are meshedly connected with opening and closing gears (204), the insides of the four opening and closing gears (204) are fixedly mounted with opening and closing rods (203), the outer surfaces of the four opening and closing rods (203) are fixedly mounted with opening and closing frames (205), the insides of the four opening and closing frames (205) are provided with displacement sensor bodies (206), and the opening and closing frames (205) are used to drive the displacement sensor bodies (206) to expand and close; The test assembly (1) comprises a main shaft (107) and a secondary shaft (108), and one end of each of the main shaft (107) and the secondary shaft (108) is connected to a sealing sample (109) via bolts.

2. The double-head centrifugal testing equipment for floating oil seals of engineering machinery according to claim 1, characterized in that: The opening and closing assembly (2) further comprises four movable frames (202), the outer surfaces of the four opening and closing racks (201) are respectively movably embedded in the interior of the four movable frames (202), the outer surfaces of both sides of the four opening and closing racks (201) are provided with sliding grooves (207), the sliding rods (208) are fixedly installed on both sides of the interior of the four movable frames (202), one end of the plurality of sliding rods (208) are respectively movably embedded in the interior of the plurality of sliding grooves (207), and the two ends of the four opening and closing rods (203) are respectively movably embedded in both sides of the interior of the four movable frames (202).

3. The double-head centrifugal testing equipment for floating oil seals of engineering machinery according to claim 1, characterized in that: The test assembly (1) further comprises a test bench (101) and a control system (102); a drive system (103) is arranged on one side of the top of the test bench (101); the other end of the main shaft (107) is fixedly connected to the output end of the drive system (103); a feed system (104) is arranged inside the test bench (101); a measuring system (105) is arranged on the top of the feed system (104); the other end of the secondary shaft (108) is fixedly mounted on the outer surface of one side of the measuring system (105); an oil injection hole (110) is provided on the outer surface of one of the sealing specimens (109); a sealing plug (111) is movably embedded inside the oil injection hole (110).

4. The double-head centrifugal testing equipment for floating oil seals of engineering machinery according to claim 3, characterized in that: The test assembly (1) further comprises a second hydraulic rod (113), a movable plate (114) being fixedly mounted on the top end of the second hydraulic rod (113), an oil collecting box (115) being movably embedded inside the movable plate (114), an embedded groove (112) being provided on the top of the test bench (101), the outer surfaces of the movable plate (114) and the oil collecting box (115) being movably embedded inside the embedded groove (112), the bottom end of the second hydraulic rod (113) being fixedly mounted on the bottom surface inside the test bench (101), and a protective sliding cover (106) being slidably connected to the outer surface of the measuring system (105).

5. The double-head centrifugal testing equipment for floating oil seals of engineering machinery according to claim 3, characterized in that: The moving assembly (3) comprises an annular frame (301), a mounting ring (306) and two first hydraulic rods (303); a moving frame (302) is fixedly mounted on the top and bottom of the annular frame (301); four support rods (304) are fixedly mounted on the outer surface of one side of the measuring system (105); one end of the four support rods (304) are movably penetrated through the outer surface of one side of the two moving frames (302); the four opening and closing racks (201) are mounted on the outer surface of one side of the mounting ring (306) by bolts; one end of the two first hydraulic rods (303) are fixedly mounted on the outer surface of one side of the two moving frames (302); and the other ends of the two first hydraulic rods (303) are fixedly mounted on the outer surface of one side of the measuring system (105).

6. The double-head centrifugal testing equipment for floating oil seals of engineering machinery according to claim 5, characterized in that: The rotating assembly (4) comprises a ring gear (403), the outer surface of the ring gear (403) is provided with a ring groove (404), the outer surface of the ring frame (301) is movably embedded in the inner surface of the ring groove (404), and the outer surface of the mounting ring (306) is fixedly mounted on the inner wall of the ring gear (403).

7. The double-head centrifugal testing equipment for floating oil seals of engineering machinery according to claim 6, characterized in that: The rotating assembly (4) further comprises a forward and reverse motor (401), a driving gear (402) being fixedly mounted on the output end of the forward and reverse motor (401), the outer surface of the driving gear (402) being meshed with the outer surface of the ring gear (403), the bottom of the forward and reverse motor (401) being fixedly mounted on the top of a mounting plate (305), and the moving assembly (3) further comprises a mounting plate (305), the outer surface of one side of the mounting plate (305) being fixedly mounted on the outer surface of the other side of one of the moving frames (302).

8. The double-head centrifugal testing equipment for floating oil seals of engineering machinery according to claim 7, characterized in that: The limit assembly (5) comprises a fixed ring (501), the outer surface of the fixed ring (501) is provided with an annular rotation groove (502), a connecting plate (503) is movably embedded inside the annular rotation groove (502), an annular electromagnet (504) is fixedly mounted on the outer surface of one side of the connecting plate (503), and the inner wall of the fixed ring (501) is fixedly mounted on the outer surface of one end of the secondary shaft (108).

9. The double-head centrifugal testing equipment for floating oil seals of engineering machinery according to claim 8, characterized in that: The limit assembly (5) further comprises two electric push rods (505), one end of the two electric push rods (505) being fixedly mounted with an annular plate (506), one side outer surface of the annular plate (506) being fixedly mounted with a plurality of movable rods (507), one end of the plurality of movable rods (507) being movable through the fixed ring (501) to the inside of the annular rotating groove (502), one end of the plurality of movable rods (507) being fixedly mounted on the other side outer surface of the connecting plate (503), one side outer surface of the fixed ring (501) being provided with an installation opening (508), a compensation block (509) being arranged inside the installation opening (508), the compensation block (509) being connected to the fixed ring (501) by bolts, and the other ends of the two electric push rods (505) being fixedly mounted on the one side outer surface of the measuring system (105) near the secondary shaft (108).

10. The double-head centrifugal testing equipment for floating oil seals of engineering machinery according to claim 9, characterized in that: The outer surfaces of the four movable frames (202) are movably embedded in the annular rotating groove (502), one side outer surface of the four movable frames (202) is provided with a magnetic attraction groove (209), the inside of the four magnetic attraction grooves (209) is provided with an arc magnet (210), and one side outer surface of the four arc magnets (210) is magnetically connected to one side outer surface of the annular electromagnet (504).

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